From 1830322412c0e163cb1534b8e1d618dbfd3ddcd4 Mon Sep 17 00:00:00 2001
From: fye <feng_ye_@hotmail.com>
Date: Wed, 27 Apr 2022 14:09:34 -0700
Subject: [PATCH] CG: fix infinite recursion from SweepUnusedStaticSymbol
 exposed by profileGen

---
 src/mapleall/maple_be/src/cg/cg_phasemanager.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/mapleall/maple_be/src/cg/cg_phasemanager.cpp b/src/mapleall/maple_be/src/cg/cg_phasemanager.cpp
index 47660be46c..667003acce 100644
--- a/src/mapleall/maple_be/src/cg/cg_phasemanager.cpp
+++ b/src/mapleall/maple_be/src/cg/cg_phasemanager.cpp
@@ -107,6 +107,7 @@ void CgFuncPM::PostOutPut(MIRModule &m) {
 }
 
 void MarkUsedStaticSymbol(const StIdx &symbolIdx);
+std::map<StIdx, bool> visitedSym;
 
 void CollectStaticSymbolInVar(MIRConst *mirConst) {
   if (mirConst->GetKind() == kConstAddrof) {
@@ -128,6 +129,11 @@ void MarkUsedStaticSymbol(const StIdx &symbolIdx) {
   if (symbol == nullptr) {
     return;
   }
+  if (visitedSym[symbolIdx]) {
+    return;
+  } else {
+    visitedSym[symbolIdx] = true;
+  }
   symbol->ResetIsDeleted();
   if (symbol->IsConst()) {
     auto *konst = symbol->GetKonst();
@@ -185,6 +191,7 @@ void CgFuncPM::SweepUnusedStaticSymbol(MIRModule &m) {
     }
   }
 
+  visitedSym.clear();
   /* scan all funtions  */
   std::vector<MIRFunction*> &funcTable = GlobalTables::GetFunctionTable().GetFuncTable();
   /* don't optimize this loop to iterator or range-base loop
-- 
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